Secure connection device of SM4 encryption and decryption algorithm network security equipment

Abstract

The invention relates to the technical field of cooling of data processing equipment, in particular to a secure connection device of SM4 encryption and decryption algorithm network security equipment, which comprises a password card main body, a main frame part, a fixed heat dissipation part, an extension heat dissipation part, a bearing locking part, an expandable heat conduction part and a positioning guide part, the lower side of the frame body is fixedly connected with an abutting frame, the right side of the interior of the frame body is fixedly connected with an abutting strip, the inner side of the frame body is fixedly connected with a password card main body, and the password card main body is located between the abutting strip and the abutting frame. Through the arrangement of the extensible heat conduction part, the extension heat dissipation part, the fixed heat dissipation part, the main frame and other structures, the safety connection device can protect the golden fingers from being damaged when not installed and used, the safety connection device can be unfolded in a machine shell of the network safety equipment when installed and used, the heat dissipation area is increased, the air cooling efficiency is improved, the cost is low, and the safety connection device is suitable for popularization and application. And tight and stable connection between the golden finger and the interface end is ensured, and the reliability of data transmission is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling of data processing equipment, in particular to a secure connection device for a network security device using an SM4 encryption and decryption algorithm. Background Art

[0002] A secure connection device is a device or module used to ensure the security of network communications. This device not only physically connects network devices, but also logically establishes a secure communication channel. Through identity authentication and access control functions, it ensures that only legitimate users or devices can access and use data, thereby achieving a secure network connection. The secure connection device of the SM4 encryption and decryption algorithm network security device refers to a component or module integrated in the network security device that is specifically used to perform SM4 encryption and decryption operations. The password card is a typical example of this. It is connected to the server or other devices through interfaces such as PCI-E or PCI, providing efficient encryption and decryption services to ensure the security of data during transmission and storage. The password card supports the SM4 algorithm and can perform data encryption and decryption processing. It also has functions such as identity authentication, digital signature and data integrity verification, providing comprehensive security protection for network security devices.

[0003] The secure connection device, i.e. the password card, will generate heat when performing operations such as encryption and decryption, especially under high load and long-term operation. If the heat cannot be dissipated in time, it may cause overheating, affecting its performance and life, and even cause failure. In order to ensure stable operation and extend service life, the password card is usually equipped with heat dissipation measures, mainly including the following: First, heat dissipation is carried out through fixed heat sinks, but this heat dissipation method is relatively passive and has limited heat dissipation performance; second, water cooling is carried out through circulating coolant, but due to the small size of the password card, the adapted liquid pump and other water cooling mechanisms also need to be made very small, resulting in a high cost of the heat dissipation measure; third, the rare use of cold storage The refrigerant is used to dissipate heat, but the password card is usually installed in a server or other equipment that runs for a long time. The internal temperature of these devices is high. In such a high-temperature environment, the refrigerant cannot effectively absorb and store cold energy, and it is also impossible to continuously cool the password card. The heat dissipation effect of the refrigerant depends on the cold energy it stores. Once the cold energy is exhausted, the heat dissipation effect will drop significantly, and it cannot meet the heat dissipation requirements of the password card that runs for a long time. Therefore, the refrigerant is not suitable for dissipating heat for the password card. From the above description, it can be seen that the existing secure connection device, i.e., the password card, has some shortcomings in heat dissipation and cooling. Therefore, based on the above problems, a secure connection device for network security equipment using the SM4 encryption and decryption algorithm is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a secure connection device for a network security device of an SM4 encryption and decryption algorithm, so as to solve the problem that various heat dissipation cooling methods of the existing secure connection device, i.e., the password card, have limited heat dissipation performance or high cost.

[0005] To achieve the above object, the present invention provides the following technical solutions: A secure connection device for a network security device using an SM4 encryption and decryption algorithm comprises a password card body, a main frame, a fixed heat dissipation portion, an extended heat dissipation portion, a supporting lock portion, an expandable heat-conducting portion, and a positioning and guiding portion. The main frame comprises a frame body, the lower side of the frame body is fixedly connected to a resist frame, the inner right side of the frame body is fixedly connected to a resist bar, the inner side of the frame body is fixedly connected to a password card body, and the password card body is located between the resist bar and the resist frame, guide rails are provided on the front and rear sides of the frame body, the inner sides of the guide rails are slidably connected to guide blocks, a first spring is installed between the right end face of the guide block and the right inner wall of the guide rail, one end of the rotating rod of the guide block is rotatably connected to a horizontally arranged heat-conducting rotating arm, and a group of the heat-conducting rotating arms are installed with an expandable heat-conducting portion on the right end.

[0006] Preferably, the expandable heat-conducting portion includes a heat-conducting sleeve fixedly connected to the heat-conducting rotating arm, a storage groove higher than the password card body is opened on the left side of the heat-conducting sleeve, and a storage tank is opened on the right side of the heat-conducting sleeve. A pair of storage covers symmetrically arranged in an upper and lower manner are rotatably connected to the right side of the heat-conducting sleeve through a connecting soft belt, and a second heat-conducting silicone sheet in a bent arrangement is fixedly connected between the storage covers and the storage tanks. The front and rear sides of the storage cover are fixedly connected to protruding rods, and rubber bands are sleeved on the outer sides of the upper and lower protruding rods. A fixed heat dissipation portion located on the left side of the expandable heat-conducting portion is installed on the upper side of the password card body.

[0007] 12. The heat dissipation device as described in claim 9, wherein the bridge has two opposite ends, and one of the ends is disconnected from the mounting plate to form a cutout between the one of the ends and the mounting plate, the wires being collected by the bridge to make way for the breakages, the wires being collected by the bridge.

[0008] Preferably, the supporting locking portion includes a supporting folding plate fixed to the left side of the frame, the upper end surface of the supporting folding plate and the lower end surface of the heat dissipation extension strip group are arranged in the same plane, the front and rear sides of the supporting folding plate are fixedly connected with supporting strips, the supporting strips are arranged on the lower left side of the heat-conducting rotating arm, the upper end surface of the supporting strip and the lower end surface of the heat-conducting rotating arm are arranged in the same plane, and the supporting folding plate, the supporting strip and the heat dissipation fins are plate structures of the same metal.

[0009] Preferably, the width dimension of the limiting guide bar is greater than the thickness dimension of the heat dissipation fin, the heat dissipation extension bar group is arranged between the limiting guide bar and the thermal base, the length dimension of the heat dissipation extension bar group is the same as the length dimension of the heat dissipation fin, the push bars are arranged on the right side of the fixed heat dissipation part, the left end face of the push bar is in contact with the right end of the thermal base, the groove depth dimension of the storage cover is the same as the groove depth dimension of the storage tank, and the thickness dimension of the second thermal conductive silicone sheet is greater than the groove depth dimension of the storage tank.

[0010] Preferably, the inner sides of the holes of the guide blocks are fixedly connected with damping sleeves, the inner sides of the damping sleeves are provided with damping rods, both ends of the damping rods are fixedly connected with the left and right inner walls of the guide rails, a group of facing surfaces of the heat-conducting rotating arms are provided with positioning rail grooves, the front and rear sides of the frame body are provided with mounting openings on the left side of the heat-conducting rotating arm, the left sides of the mounting openings are provided with through holes, the supporting folding plate is provided with guide holes aligned with the through holes, the inner sides of the guide holes are slidably connected with push rods on the inner sides of the through holes, the left side of the supporting folding plate is rotatably connected with an adjusting bolt, and the outer screw of the adjusting bolt The thread is connected with a linkage bar fixedly connected to the left end of the push rod, and a positioning guide part is installed on the inner side of the mounting port, and the positioning guide part includes a shell fixed on the inner side of the mounting port, and a guide pin is provided on the inner side of the shell, and a guide cavity is opened on the inner side of the guide pin. The inner side of the guide cavity is slidably connected with a limit rod, and the right end of the limit rod is fixedly connected to the inner wall of the shell, and the outer side of the limit rod is sleeved with a second spring on the plane side of the guide pin. An insertion hole connected to the through hole is opened on the left side of the shell, and the insertion holes are all on the plane end side of the guide pin, and the right end of the push rod is on the inner side of the insertion hole.

[0011] Preferably, a spacing is provided between the linkage bar and the supporting folding plate, the diameter of the guide pin is the same as the rail width of the positioning rail groove, the guide pin and the positioning rail groove are arranged to be aligned horizontally on the left and right sides, the end of the guide pin close to the heat-conducting rotating arm is rounded, the round head end of the guide pin protrudes from the shell, a gap is provided between the guide pin and the inner wall of the shell, and an exhaust duct is provided on the side of the guide cavity away from the limit rod.

[0012] Preferably, a protection slot for receiving the gold fingers of the password card body is opened on the left side of the heat-conducting sleeve, and elastic protection pads are fixedly connected to the upper and lower sides of the protection slot, and the elastic protection pads are attached to the upper and lower sides of the gold fingers of the password card body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the expandable heat-conducting portion, the extended heat-dissipating portion, the fixed heat-dissipating portion, and the main frame are provided so that the main frame can support the password card body. Before the expandable heat-conducting portion is activated, it can protect the gold finger of the password card body. When the connection is required, the movement of the main frame can drive the expandable heat-conducting portion to rotate and displace, thereby driving the extended heat-dissipating portion to extend based on the fixed heat-dissipating portion. This ensures that the security connection device can protect the gold finger from damage when not installed and in use, and can be expanded within the housing of the network security device when installed and in use. This not only increases the heat dissipation area and improves the air cooling efficiency with low cost, but also ensures a tight and stable connection between the gold finger and the interface end, ensuring the reliability of data transmission. This solves the problem of limited heat dissipation performance or high cost of various heat dissipation and cooling methods of existing security connection devices, i.e., password cards. 2. In the present invention, by providing the positioning guide, positioning rail groove, damping rod and damping sleeve and other structures, after the chassis cover is reset and installed, the expandable heat-conducting part will press down the heat-conducting rotating arm and the guide block, forcing the first spring to contract. Due to the provision of the positioning guide and the positioning rail groove, the heat-conducting rotating arm and the frame cannot bend. At this time, the elastic force of the first spring will apply positive downward pressure to the frame, and then apply positive downward pressure to the password card body in the frame. At the same time, the damping rod and the damping sleeve apply damping to the guide block, so that the main frame maintains its expanded state after being pressed by the chassis cover, and will not change due to slight vibration, thereby ensuring that the gold finger of the password card body maintains close and stable contact with the interface end, ensuring the reliability of data transmission and the normal operation of the password card body, and preventing the password card body from automatically losing contact with the interface due to vibration or other reasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Another perspective structural diagram; Figure 3 For the present invention Figure 2 Schematic diagram of the structure viewed from above; Figure 4 It is a structural schematic diagram of the main frame of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the split structure; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A; Figure 7 For the present invention Figure 5 Schematic diagram of the structure at B; Figure 8 It is a structural schematic diagram of the guide block of the present invention; Figure 9 This is a schematic structural diagram of the fixed heat dissipation portion of the present invention; Figure 10 This is a schematic structural diagram of the extended heat dissipation portion of the present invention; Figure 11 It is a structural schematic diagram of the supporting and locking portion of the present invention; Figure 12 This is a structural diagram of the supporting folding plate of the present invention; Figure 13 This is a schematic cross-sectional view of the positioning and guiding portion of the present invention; Figure 14 Schematic diagram of the structure of the expandable heat-conducting portion of the present invention; Figure 15 For the present invention Figure 14 Schematic diagram of the split structure; Figure 16 For the present invention Figure 15 Another perspective structural diagram; Figure 17 For the present invention Figure 1 Schematic diagram of the structure after installation; Figure 18 For the present invention Figure 17 Schematic diagram of the structure without the casing cover; Figure 19 For the present invention Figure 17 Schematic diagram of the structure viewed from above; Figure 20 For the present invention Figure 19 Schematic diagram of the structure at point C.

[0015] Figure: 1. Password card body; 2. Main frame; 201. Frame; 202. Abutment bar; 203. Abutment frame; 204. Mounting port; 205. Perforation; 206. Guide rail; 207. Damping rod; 208. Damping sleeve; 209. Guide block; 210. First spring; 211. Heat transfer arm; 212. Positioning rail groove; 3. Fixed heat dissipation unit; 31. Heat transfer silicone sheet 1; 32. Heat transfer base; 33. Heat dissipation fins; 34. Positioning guide bar; 4. Extended heat dissipation unit; 41. Base bar; 42. Heat dissipation extension bar group; 43. Rotation port; 44 , rotating block; 45, elastic pull rope; 5, supporting locking part; 51, supporting folding plate; 52, supporting bar; 53, guide hole; 54, push rod; 55, adjusting bolt; 56, connecting bar; 6, expandable heat-conducting part; 61, heat-conducting sleeve; 62, protection slot; 63, elastic protection pad; 64, storage slot; 65, storage tank; 66, storage cover; 67, second heat-conducting silicone sheet; 68, protruding rod; 69, rubber band; 7, positioning and guiding part; 71, shell; 72, guide pin; 73, guide cavity; 74, limit rod; 75, second spring; 76, insertion hole. DETAILED DESCRIPTION

[0016] See also Figures 1-20 , the present invention provides a technical solution: A secure connection device for a network security device using an SM4 encryption and decryption algorithm, comprising a password card body 1, a main frame 2, a fixed heat dissipation portion 3, an extended heat dissipation portion 4, a supporting lock portion 5, an expandable heat conduction portion 6, and a positioning and guiding portion 7. The main frame 2 comprises a frame 201, the lower side of the frame 201 is fixedly connected to a frame 203, the inner right side of the frame 201 is fixedly connected to a bar 202, the inner side of the frame 201 is fixedly connected to the password card body 1, and the password card body 1 is located between the bar 202 and the frame 203, the front and rear sides of the frame 201 are provided with guide rails 206, the inner sides of the guide rails 206 are slidably connected to guide blocks 209, the right end surface of the guide block 209 and the right inner wall of the guide rail 206 are both installed with first springs 210, the guide blocks 209 are fixedly connected to the right end surface of the guide block 209 and the right inner wall of the guide rail 206, and the guide blocks 209 are fixedly connected to the right end surface of the guide block 209 and the right inner wall of the guide rail 206. One end of the rotating rod of 09 is rotatably connected to a horizontally arranged heat-conducting rotating arm 211, and the right end of a group of heat-conducting rotating arms 211 is installed with an expandable heat-conducting part 6, which includes a heat-conducting sleeve 61 fixedly connected to the heat-conducting rotating arm 211. A storage groove 64 higher than the password card body 1 is opened on the left side of the heat-conducting sleeve 61, and a storage tank 65 is opened on the right side of the heat-conducting sleeve 61. A pair of storage covers 66 symmetrically arranged in upper and lower directions are rotatably connected to the right side of the heat-conducting sleeve 61 through a connecting soft belt. A bent heat-conducting silicone sheet 67 is fixedly connected between the storage cover 66 and the storage tank 65. The front and rear sides of the storage cover 66 are fixedly connected to a protruding rod 68, and the outer sides of the upper and lower protruding rods 68 are sleeved with rubber bands 69. The upper side of the password card body 1 is installed with a heat-conducting sleeve 61 in the expandable heat-conducting part. The fixed heat dissipation part 3 on the left side of the heat part 6 can store the thermal conductive silicone sheet 2 67 through the storage tank 65 provided, and can be unfolded when needed. After unfolding, it can improve the heat dissipation efficiency by cooperating with the case cover; the fixed heat dissipation part 3 includes a thermal conductive silicone sheet 1 31 installed and attached to the upper side of the password card body 1, and the upper side of the thermal conductive silicone sheet 1 31 is fixedly connected to a thermal conductive base 32, and the upper side of the thermal conductive base 32 is fixedly connected to a plurality of heat dissipation fins 33 arranged at equal distances, and the upper sides of the heat dissipation fins 33 are fixedly connected to the limiting guide strips 34, and an extended heat dissipation part 4 is installed at the fixed heat dissipation part 3, and the extended heat dissipation part 4 includes a base strip 41 on the left side of a group of heat dissipation fins 33, and the right side of the base strip 41 is fixedly connected to a plurality of heat dissipation fins 33 that are slidably connected. The heat dissipation extension strip group 42 is composed of two extension strips and is arranged on both sides of the heat dissipation fins 33. The inner side of the base strip 41 is provided with a turning mouth 43 with an upper opening. The inner side of the turning mouth 43 is rotatably connected to a turning block 44 that is horizontally aligned with the storage groove 64. The right end of the turning block 44 is fixedly connected to an elastic pull rope 45 in an elastically expanded state. The right end of the elastic pull rope 45 is fixedly connected to the inner wall of the storage groove 64. A supporting locking portion 5 is installed on the left side of the frame 201. Through this arrangement, the fixed heat dissipation portion 3 and the extended heat dissipation portion 4 can be expanded. After expansion, the contact area with the air can be increased, thereby improving the air-cooling and heat dissipation effect. The displacement of the expandable heat-conducting portion 6 can drive the extension heat dissipation portion 4 to move;The supporting locking portion 5 includes a supporting folding plate 51 fixed to the left side of the frame 201, and the upper end surface of the supporting folding plate 51 and the lower end surface of the heat dissipation extension strip group 42 are arranged in the same plane. Through this arrangement, the supporting folding plate 51 can support the heat dissipation extension strip group 42 after displacement, and the front and rear sides of the supporting folding plate 51 are fixedly connected with supporting bars 52. The supporting bars 52 are all arranged on the lower left side of the heat-conducting rotating arm 211. The upper end surface of the supporting bar 52 and the lower end surface of the heat-conducting rotating arm 211 are arranged in the same plane. Through this arrangement, the heat-conducting rotating arm 211 can be supported by the supporting bar 52 after rotation. The supporting folding plate 51, the supporting bar 52 and the heat dissipation fins 33 are plate structures of the same metal. Through this arrangement, the supporting locking portion 5 can conduct heat; the width of the limiting guide bar 34 is larger than the heat dissipation The thickness of the fins 33 and the heat dissipation extension strip group 42 are both positioned between the limiting guide strip 34 and the thermal base 32. This arrangement allows for the heat dissipation extension strip group 42 to be positioned and guided. The length of the heat dissipation extension strip group 42 is the same as the length of the heat dissipation fins 33. The stopper strips 202 are both positioned on the right side of the fixed heat dissipation unit 3, with the left end surface of the stopper strip 202 abutting against the right end of the thermal base 32. This arrangement limits the fixed heat dissipation unit 3 and prevents the tension of the elastic drawstring 45 from affecting the position of the fixed heat dissipation unit 3. The groove depth of the storage cover 66 is the same as that of the storage tank 65. The thickness of the second thermal conductive silicone sheet 67 is greater than that of the storage tank 65. This arrangement allows the second thermal conductive silicone sheet 67 to protrude beyond both the storage tank 65 and the storage cover 66 when deployed.

[0017] like Figure 2-Figure 8 、 Figure 11-13As shown, the inner sides of the holes of the guide blocks 209 are fixedly connected with damping sleeves 208, the inner sides of the damping sleeves 208 are provided with damping rods 207, both ends of the damping rods 207 are fixedly connected to the left and right inner walls of the guide rails 206, a group of heat-conducting rotating arms 211 are provided with positioning rail grooves 212 on the facing surfaces, the front and rear sides of the frame 201 are provided with mounting openings 204 on the left side of the heat-conducting rotating arms 211, the left side of the mounting openings 204 are provided with through holes 205, the supporting folding plate 51 is provided with guide holes 53 aligned with the through holes 205, and the inner sides of the guide holes 53 are slidably connected with the guide holes 53 on the inner sides of the guide holes 206. 05 inner side of the lever 54, the left side of the supporting folding plate 51 is rotatably connected with an adjusting bolt 55, the outer side of the adjusting bolt 55 is threadedly connected with a linkage bar 56 fixedly connected to the left end of the lever 54, the inner side of the mounting port 204 is installed with a positioning guide portion 7, the positioning guide portion 7 includes a shell 71 fixed to the inner side of the mounting port 204, the inner side of the shell 71 is provided with a guide pin 72, the inner side of the guide pin 72 is provided with a guide cavity 73, the inner side of the guide cavity 73 is slidably connected with a limiting rod 74, the right end of the limiting rod 74 is fixedly connected to the inner wall of the shell 71, and the outer side of the limiting rod 74 is provided with a guide pin 71. 2. The second spring 75 on the plane side, the left side of the housing 71 is provided with an insertion hole 76 connected to the through hole 205, and the insertion holes 76 are all on the plane end side of the guide pin 72, and the right end of the push rod 54 is all on the inner side of the insertion hole 76. Through this arrangement, when the heat conducting arm 211 rotates, the guide pin 72 of the positioning guide portion 7 is squeezed, forcing the guide pin 72 to move deeper into the housing 71. When the heat conducting arm 211 has completed its rotation, the guide pin 72 will be reset under the action of the second spring 75 and inserted into the positioning rail groove 212. Subsequently, the user adjusts the position by turning the adjusting bolt 55 is used to adjust the linkage bar 56 to move rightward, so that the linkage bar 56 drives the push rod 54 to move rightward and insert into the inner side of the housing 71 of each positioning guide part 7, pressing against the guide pin 72, and limiting the guide pin 72 to ensure that the guide pin 72 cannot escape from the positioning track groove 212. At this time, the cooperation between the guide pin 72, the positioning track groove 212 and the guide block 209 can guide and limit the movement of the heat conduction arm 211, so that the heat conduction arm 211 can only move horizontally, ensuring that the structure of the main frame 2 will not bend after it is rotated and unfolded, preparing for the subsequent stable connection of the password card body 1 to the insertion interface end;A spacing is set between the linkage bar 56 and the supporting folding plate 51. Through this setting, the linkage bar 56 can be displaced to the right. The diameter of the guide pin 72 is the same as the rail width of the positioning rail groove 212. The guide pin 72 and the positioning rail groove 212 are aligned horizontally left and right. Through this setting, the heat-conducting rotating arm 211 after rotation will allow the positioning rail groove 212 and the guide pin 72 to fit tightly and stably. The end of the guide pin 72 close to the heat-conducting rotating arm 211 is a round head setting, and the round head end of the guide pin 72 protrudes from the shell 71. Through this setting, the rotation of the heat-conducting rotating arm 211 will automatically press the guide pin 72 into the depth of the shell 71, and a gap is set between the guide pin 72 and the inner wall of the shell 71 An exhaust duct is provided on the side of the guide cavity 73 away from the limit rod 74. This arrangement allows the gas within the housing 71 and the guide cavity 73 to be discharged when the guide pin 72 is displaced, without being affected by air pressure. A protective slot 62 is provided on the left side of the heat-conducting sleeve 61 to accommodate the gold finger of the password card body 1. Elastic protective pads 63 are fixedly connected to the upper and lower sides of the protective slot 62. The elastic protective pads 63 are attached to the upper and lower sides of the gold finger of the password card body 1. Through this arrangement, the protective slot 62 and the elastic protective pads 63 can protect the gold finger of the password card body 1, preventing scratches on the gold finger of the password card body 1 caused by vibration, external dust, or sharp objects.

[0018] Workflow: The installation and use of the heat dissipation cooling operation of the secure connection device of the SM4 encryption and decryption algorithm network security device, namely the password card, are as follows: Note 1: The password card body 1 of this solution is designed to be vertically inserted into the interface end of the device motherboard and connected to the network security device. It is suitable for the device chassis environment equipped with an air-cooling fan; Note 2: When the device of this solution is normally not in use, the protection slot 62 and the elastic protection pad 63 can protect the gold finger of the password card body 1 to avoid scratches on the gold finger of the password card body 1 caused by vibration, external dust or sharp objects; Note 3: The network security device described later Refers to devices such as servers and firewalls that can support the insertion and connection of the password card body 1; Preparation before installation: The user can pinch the left part of the frame 201 of the main frame 2 with the left hand, pinch the heat-conducting cover 61 of the expandable heat-conducting part 6 with the right hand, and then pull the heat-conducting cover 61 to the right with the right hand, driving the entire expandable heat-conducting part 6 to move to the right. This action will make the gold finger of the password card body 1 break away from the protection of the protection slot 62 and the elastic protection pad 63, so that the gold finger of the password card body 1 is exposed, and at the same time, the expandable heat-conducting part 6 loses its rotation restriction. Then the user can rotate the expandable heat-conducting part 6 to the left 180 degrees. This rotation will drive the heat-conducting rotating arm 211 to rotate 180 degrees. On the one hand, the heat-conducting rotating arm 211 will contact the supporting folding plate 51 and the supporting bar 52 of the supporting locking portion 5, thereby establishing heat conduction between the expandable heat-conducting portion 6 and the supporting locking portion 5 through the heat-conducting rotating arm 211; on the other hand, during the rotation of the heat-conducting rotating arm 211, the guide pin 72 of the positioning guide portion 7 will be squeezed, forcing the guide pin 72 to move deeper into the shell 71. When the heat-conducting rotating arm 211 has completed its rotation, the guide pin 72 will be reset under the action of the second spring 75 and inserted into the positioning rail groove 212. Subsequently, the user can By rotating the adjusting bolt 55 to adjust the linkage bar 56 to move rightward, the linkage bar 56 drives the push rod 54 to move rightward and insert into the inner side of the housing 71 of each positioning guide portion 7, pressing against the guide pin 72, and limiting the guide pin 72 to ensure that the guide pin 72 cannot escape from the positioning rail groove 212. At this time, the cooperation between the guide pin 72, the positioning rail groove 212 and the guide block 209 can guide and limit the movement of the heat conduction arm 211, so that the heat conduction arm 211 can only move horizontally, ensuring that the structure of the main frame 2 will not bend after rotation and expansion, and preparing for the subsequent stable insertion of the password card body 1 into the interface end;At the same time, the rotation displacement of the expandable heat-conducting part 6 will drive the elastic pull rope 45 to rotate and displace in the left direction, and then drive the rotating block 44 to rotate. At this time, the leftward pulling force of the elastic pull rope 45 is converted into rightward pulling force, causing the elastic pull rope 45 to elastically contract, pulling the entire extended heat-dissipating part 4 to be displaced and extended to the left based on the fixed heat-dissipating part 3, completing the extension and expansion between the fixed heat-dissipating part 3 and the extended heat-dissipating part 4. The displaced extended heat-dissipating part 4 will contact the supporting folding plate 51 of the supporting locking part 5, and establish heat conduction between the extended heat-dissipating part 4 and the heat-conducting rotating arm 211 through the supporting locking part 5. Finally, the user needs to unfold the expandable heat-conducting part 6 and remove the rubber bands 69 on both sides of the storage cover 66 from the protruding rods 68, so that the rotation of the storage cover 66 is no longer restricted. At this time, the user can rotate the storage covers 66 on both sides to make the thermal conductive silicone sheet 2 67 stored in the storage cover 66 and the storage tank 65 in a bent state unfold straightly, completing the expansion of the expandable heat-conducting part 6 (such as; Figure 18As shown), through the above steps, the preparatory operations before installation can be completed; Installation and connection operation: First, open the casing cover of the network security device where you want to install the security connection device to expose the motherboard inside the device and the interface end on the motherboard. At this time, you can vertically downwards insert the password card body 1 with the exposed gold finger into the interface end to complete the connection between the password card body 1 and the device. The password card body 1 can provide efficient encryption and decryption services to the device to ensure the security of data during transmission and storage. It supports the SM4 algorithm and can perform data encryption and decryption processing. At the same time, it has functions such as identity authentication, digital signature and data integrity verification, providing comprehensive security protection for network security equipment. After the connection is completed, replace the casing cover of the device. The installation and reset of the casing cover will press down the expandable thermal conductive part 6, which makes the casing cover and the expandable thermal conductive part 6 tightly connected with the thermal conductive silicone sheet 2 67. On the other hand, the housing cover will further press down the heat-conducting arm 211 and the guide block 209 through the expandable heat-conducting portion 6, forcing the first spring 210 to contract. Due to the arrangement of the positioning guide portion 7 and the positioning rail groove 212, the heat-conducting arm 211 and the frame body 201 cannot bend. At this time, the elastic force of the first spring 210 will apply positive downward pressure to the frame body 201, and then apply positive downward pressure to the password card body 1 in the frame body 201. At the same time, the damping rod 207 and the damping sleeve 208 apply damping to the guide block 209, so that the main frame 2 maintains its state after being expanded and compressed by the housing cover, and will not change due to slight vibration, thereby ensuring that the gold finger of the password card body 1 maintains close and stable contact with the interface end, ensuring the reliability of data transmission and the normal operation of the password card body 1, and preventing the password card body 1 from automatically losing contact with the interface due to vibration or other reasons;Heat dissipation and cooling operation: When the password card body 1 is running under high load for a long time, it will generate heat. At this time, the thermal conductive silicone sheet 1 31 and the thermal conductive base 32 will transfer the heat to each heat dissipation fin 33. While dissipating the heat, the heat dissipation fin 33 will transfer part of the heat to each heat dissipation extension bar group 42. During the heat dissipation process, the heat dissipation extension bar group 42 will transfer the heat to the heat conduction arm 211 through the supporting folding plate 51 and the supporting bar 52 of the supporting locking part 5. Then the heat conduction arm 211 transfers the heat to the heat conduction shell 61 of the expandable heat conduction part 6, and then the heat conduction shell 61 transfers the heat to the thermal conductive silicone sheet 2 67, and finally transfers the heat to the entire case cover. The extended and unfolded structure between the two components increases its surface area, allowing it to come into contact with more air, thereby improving the air-cooling and heat dissipation effect. At the same time, the housing cover also increases the heat dissipation area, further improving heat dissipation efficiency and effectively reducing the temperature of the password card body 1, ensuring its stable operation and performance. This ensures that the security connection device can protect the gold finger from damage when not installed and in use, and can be unfolded within the housing of the network security device when installed and in use. This not only increases the heat dissipation area and improves air cooling efficiency at a low cost, but also ensures a tight and stable connection between the gold finger and the interface end, ensuring the reliability of data transmission, and solves the problems of limited heat dissipation performance or high cost of various heat dissipation cooling methods of existing security connection devices, i.e., password cards.

[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A secure connection device for a network security device using an SM4 encryption and decryption algorithm, comprising a password card body (1), a main frame (2), a fixed heat dissipation portion (3), an extended heat dissipation portion (4), a supporting locking portion (5), an expandable heat conduction portion (6) and a positioning and guiding portion (7), characterized in that: The main frame portion (2) includes a frame body (201), the lower side of the frame body (201) is fixedly connected to a resist frame (203), the inner right side of the frame body (201) is fixedly connected to a resist bar (202), the inner side of the frame body (201) is fixedly connected to a password card body (1), and the password card body (1) is located between the resist bar (202) and the resist frame (203), the front and rear sides of the frame body (201) are provided with guide rails (206), the inner sides of the guide rails (206) are slidably connected to guide blocks (209), a first spring (210) is installed between the right end surface of the guide block (209) and the right inner wall of the guide rail (206), one end of the rotating rod of the guide block (209) is rotatably connected to a horizontally arranged heat-conducting rotating arm (211), and a group of heat-conducting rotating arms (211) are installed with an expandable heat-conducting portion (6) at the right end.

2. The secure connection device of a network security device using the SM4 encryption and decryption algorithm according to claim 1, characterized in that: The expandable heat-conducting portion (6) comprises a heat-conducting sleeve (61) fixedly connected to the heat-conducting rotating arm (211); a storage slot (64) higher than the password card body (1) is provided on the left side of the heat-conducting sleeve (61); a storage slot (65) is provided on the right side of the heat-conducting sleeve (61); a pair of storage covers (66) symmetrically arranged in an upper and lower direction are rotatably connected to the right side of the heat-conducting sleeve (61) through a connecting soft belt; a second heat-conducting silicone sheet (67) in a bent arrangement is fixedly connected between the storage covers (66) and the storage slot (65); a protruding rod (68) is fixedly connected to the front and rear sides of the storage cover (66); and rubber bands (69) are sleeved on the outer sides of the upper and lower protruding rods (68); and a fixed heat dissipation portion (3) located on the left side of the expandable heat-conducting portion (6) is installed on the upper side of the password card body (1).

3. The secure connection device for a network security device using the SM4 encryption and decryption algorithm according to claim 2, characterized in that: The fixed heat dissipation part (3) comprises a heat-conducting silicone sheet (31) mounted on the upper side of the password card body (1), the upper side of the heat-conducting silicone sheet (31) is fixedly connected to a heat-conducting base (32), the upper side of the heat-conducting base (32) is fixedly connected to a plurality of heat dissipation fins (33) arranged at equal intervals, the upper sides of the heat dissipation fins (33) are fixedly connected to limiting guide bars (34), an extended heat dissipation part (4) is mounted on the fixed heat dissipation part (3), the extended heat dissipation part (4) comprises a base bar (41) on the left side of a group of heat dissipation fins (33), and a plurality of heat dissipation fins (33) are fixedly connected to the right side of the base bar (41). (33) A slidably connected heat dissipation extension strip group (42), the heat dissipation extension strip group (42) is composed of two extension strips and both are arranged on both sides of the heat dissipation fin (33), the inner side of the base strip (41) is provided with a turning opening (43) with an upper opening, the inner side of the turning opening (43) is rotatably connected to a turning block (44) aligned with the storage groove (64) in the left and right horizontal directions, the right end of the turning block (44) is fixedly connected to an elastic pull rope (45) in an elastically expanded state, the right end of the elastic pull rope (45) is fixedly connected to the inner wall of the storage groove (64), and a supporting locking portion (5) is installed on the left side of the frame (201).

4. The secure connection device for a network security device using the SM4 encryption and decryption algorithm according to claim 3, characterized in that: The supporting locking portion (5) includes a supporting folding plate (51) fixed to the left side of the frame (201), the upper end surface of the supporting folding plate (51) and the lower end surface of the heat dissipation extension strip group (42) are arranged in the same plane, the front and rear sides of the supporting folding plate (51) are fixedly connected with supporting strips (52), the supporting strips (52) are arranged on the lower left side of the heat conduction rotating arm (211), the upper end surface of the supporting strip (52) and the lower end surface of the heat conduction rotating arm (211) are arranged in the same plane, and the supporting folding plate (51), the supporting strip (52) and the heat dissipation fin (33) are plate structures made of the same metal.

5. The secure connection device for a network security device using the SM4 encryption and decryption algorithm according to claim 3, characterized in that: The width dimension of the limiting guide bar (34) is greater than the thickness dimension of the heat dissipation fin (33); the heat dissipation extension bar group (42) is arranged between the limiting guide bar (34) and the heat-conducting base (32); the length dimension of the heat dissipation extension bar group (42) is the same as the length dimension of the heat dissipation fin (33); the support bar (202) is arranged on the right side of the fixed heat dissipation part (3); the left end face of the support bar (202) is in contact with the right end of the heat-conducting base (32); the groove depth dimension of the storage cover (66) is the same as the groove depth dimension of the storage tank (65); the thickness dimension of the second heat-conducting silicone sheet (67) is greater than the groove depth dimension of the storage tank (65).

6. The secure connection device for a network security device using the SM4 encryption and decryption algorithm according to claim 4, characterized in that: The inner side of the hole of the guide block (209) is fixedly connected with a damping sleeve (208), the inner side of the damping sleeve (208) is provided with a damping rod (207), both ends of the damping rod (207) are fixedly connected to the left and right inner walls of the guide rail (206), a group of facing surfaces of the heat-conducting rotating arms (211) are provided with positioning rail grooves (212), the front and rear sides of the frame (201) are provided with mounting openings (204) on the left side of the heat-conducting rotating arms (211), the left side of the mounting openings (204) are provided with through holes (205), the supporting folding plate (51) is provided with a guide hole (53) aligned with the through hole (205), the inner side of the guide hole (53) is slidably connected with a push rod (54) on the inner side of the through hole (205), the left side of the supporting folding plate (51) is rotatably connected with an adjusting bolt (55), the outer thread of the adjusting bolt (55) A linkage bar (56) is connected to the left end of the push rod (54), and a positioning guide portion (7) is installed on the inner side of the installation port (204). The positioning guide portion (7) includes a shell (71) fixed on the inner side of the installation port (204). A guide pin (72) is provided on the inner side of the shell (71), and a guide cavity (73) is provided on the inner side of the guide pin (72). The inner side of the guide cavity (73) is slidably connected to a limit rod (74), and the right end of the limit rod (74) is fixedly connected to the inner wall of the shell (71). The outer side of the limit rod (74) is provided with a second spring (75) on the plane side of the guide pin (72). An insertion hole (76) connected to the through hole (205) is provided on the left side of the shell (71), and the insertion holes (76) are all on the side of the plane end of the guide pin (72). The right end of the push rod (54) is all on the inner side of the insertion hole (76).

7. The secure connection device for a network security device using the SM4 encryption and decryption algorithm according to claim 6, characterized in that: A spacing is provided between the linkage bar (56) and the supporting folding plate (51); the diameter of the guide pin (72) is the same as the track width of the positioning rail groove (212); the guide pin (72) and the positioning rail groove (212) are aligned horizontally in the left and right directions; the end of the guide pin (72) close to the heat-conducting rotating arm (211) is rounded; the rounded end of the guide pin (72) protrudes from the shell (71); a gap is provided between the guide pin (72) and the inner wall of the shell (71); and an exhaust duct is provided on the side of the guide cavity (73) away from the limiting rod (74).

8. The secure connection device for a network security device using the SM4 encryption and decryption algorithm according to claim 6, characterized in that: A protective slot (62) for receiving the gold finger of the password card body (1) is provided on the left side of the heat-conducting sleeve (61). Elastic protective pads (63) are fixedly connected to the upper and lower sides of the interior of the protective slot (62). The elastic protective pads (63) are fitted to the upper and lower sides of the gold finger of the password card body (1).

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